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From: Mark Rutland <mark.rutland@arm.com>
To: Marc Zyngier <maz@kernel.org>
Cc: kvm@vger.kernel.org, Dave Martin <Dave.Martin@arm.com>,
	linux-arm-kernel@lists.infradead.org, kernel-team@android.com,
	kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH v2 1/5] KVM: arm64: Enable Address Authentication at EL2 if available
Date: Mon, 22 Jun 2020 10:04:59 +0100	[thread overview]
Message-ID: <20200622090459.GA88608@C02TD0UTHF1T.local> (raw)
In-Reply-To: <20200622080643.171651-2-maz@kernel.org>

On Mon, Jun 22, 2020 at 09:06:39AM +0100, Marc Zyngier wrote:
> While initializing EL2, enable Address Authentication if detected
> from EL1. We still use the EL1-provided keys though.
> 
> Acked-by: Andrew Scull <ascull@google.com>
> Signed-off-by: Marc Zyngier <maz@kernel.org>

Acked-by: Mark Rutland <mark.rutland@arm.com>

Mark.

> ---
>  arch/arm64/kvm/hyp-init.S | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/kvm/hyp-init.S b/arch/arm64/kvm/hyp-init.S
> index 6e6ed5581eed..1587d146726a 100644
> --- a/arch/arm64/kvm/hyp-init.S
> +++ b/arch/arm64/kvm/hyp-init.S
> @@ -104,6 +104,11 @@ alternative_else_nop_endif
>  	 */
>  	mov_q	x4, (SCTLR_EL2_RES1 | (SCTLR_ELx_FLAGS & ~SCTLR_ELx_A))
>  CPU_BE(	orr	x4, x4, #SCTLR_ELx_EE)
> +alternative_if ARM64_HAS_ADDRESS_AUTH
> +	mov_q	x5, (SCTLR_ELx_ENIA | SCTLR_ELx_ENIB | \
> +		     SCTLR_ELx_ENDA | SCTLR_ELx_ENDB)
> +	orr	x4, x4, x5
> +alternative_else_nop_endif
>  	msr	sctlr_el2, x4
>  	isb
>  
> -- 
> 2.27.0
> 
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  reply	other threads:[~2020-06-22  9:05 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-22  8:06 [PATCH v2 0/5] KVM/arm64: Enable PtrAuth on non-VHE KVM Marc Zyngier
2020-06-22  8:06 ` [PATCH v2 1/5] KVM: arm64: Enable Address Authentication at EL2 if available Marc Zyngier
2020-06-22  9:04   ` Mark Rutland [this message]
2020-06-22  8:06 ` [PATCH v2 2/5] KVM: arm64: Allow ARM64_PTR_AUTH when ARM64_VHE=n Marc Zyngier
2020-06-22  8:06 ` [PATCH v2 3/5] KVM: arm64: Allow PtrAuth to be enabled from userspace on non-VHE systems Marc Zyngier
2020-06-22  8:06 ` [PATCH v2 4/5] KVM: arm64: Check HCR_EL2 instead of shadow copy to swap PtrAuth registers Marc Zyngier
2020-06-22  8:06 ` [PATCH v2 5/5] KVM: arm64: Simplify PtrAuth alternative patching Marc Zyngier
2020-06-22  9:15   ` Mark Rutland
2020-06-22 10:25     ` Marc Zyngier
2020-06-22 10:31       ` Mark Rutland
2020-06-22 10:39     ` Andrew Scull
2020-06-22 10:43       ` Andrew Scull

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